Daily Practice Paper 120 BIOMOLECULE

D.P.P.-36
CARBOHYDRATES
a)

NCERT QUESTIONS
1. What are monosaccharides?
2. What are reducing sugars?
3. Write two main functions of carbohydrates in plants.
4. Classify the following into monosaccharides and dis-
accharides.
Ribose, 2-deoxyribose, maltose, galactose, fructose
and lactose.
5. What do you understand by the term glycosidic link- b)
age?
6. What is glycogen? How is it different from starch?
7. What are the hydrolysis products of
i) sucrose and ii) lactose?
8. What is the basic structural difference between starch
and cellulose?
9. What happens when D-glucose is treated with the
following reagents?
i) HI ii) Bromine water
iii) HNO3
c)
10. Enumerate the reactions of D-glucose which cannot
be explained by its open chain structure.
NCERT EXAMPLER QUESTIONS
11. Glycogen is a branched chain polymer of   D  glu-
cose units in which chain is formed by C1  C4 gly-
cosidic linkage whereas branching occurs by the for-
mation of C1  C6 glycosidic linkage. Structure of
glycogen is similar to ....... .
a) Amylose b) Amylopectin d)
c) Cellulose d) Glucose
12. Which of the following polymer is stored in the liver
of animals?
a) Amylose b) Cellulose 15. In disaccharides, if the reducing groups of monosac-
c) Amylopectin d) Glycogen charides, i.e., aldehydeic or ketonic groups are bonded,
13. Sucrose (cane sugar) is a disaccharide. One molecule these are non-reducing sugars. Which of the follow-
of sucrose on hydrolysis gives ing disaccharide is a non-reducing sugar?
a) 2 molecules of glucose
b) 2 molecules of glucose + 1 molecule of fructose
c) 1 molecule of glucose + 1 molecule of fructose
d) 2 molecules of fructose
14. Which of the following pairs represents anomers? a)

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Daily Practice Paper 121 BIOMOLECULE
b) Glucose reacts with hydroxylamine to form an
oxime
c) Pentaacetate of glucose does not react with hy-
droxylamine
d) Glucose is oxidised by nitric acid to gluconic acid
b) 19. Optical rotations of some compounds along with their
structues are given below. Which of them have D
configuration?

c)

d)

a) I, II, III b) II, III

16. Which of the following statements is not true about c) I, II d) III
glucose? 20. Structure of a disaccharide formed by glucose and
a) It is an aldohexose fructose is given below. Identify anomeric carbon
b) On heating with HI it forms n-hexane atoms in monosaccharide units.
c) It is present in furanose form
d) It does not give 2, 4-DNP test
17. Three cyclic stuctures of monisaccharides are given
below which of these are anomers?

a) ‘a’ carbon of glucose and ‘a’ carbon of fructose

b) ‘a’ carbon of glucose and ‘e’ carbon of fructose
c) ‘a’ carbon of glucose and ‘b’ carbon fo fructose
d) ‘f’ carbon of glucose and ‘f’ carbon fo fructose
21. Three structures are given below in which two glu-
cose units are linked. Which of these linkage between
glucose units are between C1 adn C4 and which link-
a) I and II b) II and III age are between C1 and C6?
c) I and III d) III is anomer of I and II
18. Which of the following reactions of glucose can be
explained only by its cyclic structure?
a) Glucose forms pentaacetate

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Daily Practice Paper 122 BIOMOLECULE
c) (A) and (C) are between C1 and C4, (B) is be-
tween C1 and C6
d) (A) and (C) are between C1 and C6, (B) is be-
tween C1 and C4
22. Carbohydrates are classified on the basis of their
behaviour on hydrolysis and also as reducing or non-
reducing sugar. Sucrose is a ...... .
a) monosaccharide b) disaccharide
c) reducing sugar d) non-reducing sugar
23. Which of the following carbohydrates are branched
polymers of glucose?
a) Amylose b) Amylopectin
c) Cellulose d) Glycogen
ASSERTION & REASON
Direction: In the following questions, a statement of
assertion is followed by a statement of reason. Mark
the correct choice as
(a) If both assertion and reason are true and reason
is the correct explanation of assertion
(b) If both assertion and reason are true but reason is
not the correct explanation of assertion
(c) If assertion is true but reason is false
(d) If both assertion and reason are false
24. Assertion: Polysaccharides are called non-sugars.
Reason: Carbohydrates which yield a large number
of monosaccharide units on hydrolysis are called
polysaccharides.
25. Assertion: Maltose and lactose are examples of re-
ducing sugars.
Reason: Maltose and lactose reduce Fehling’s solu-
tion and Tollen’s reagent
26. Assertion: Glucose gets oxidised to gluconic acid
on reaction with mild oxidising agent like bromine
water
Reason: Glucose contains a keto group
27. Assertion: Glucose is correctly named as D-(+)-glu-
cose
Reason: ‘D’ before the name of glucose represents
itws dextrorotatroy nature.
28. Assertion: D-(+)-glucose is dectrorotatory whereas
L-(-)-glucose is laevorotatory.
Reason: D-compounds are alsways dextro and L-
compounds are always laevorotatory.
29. Assertion: Glucose forms hydrogensulphite addition
product with NaHSO3
Reason: Glucose gives all the reaction of aldehydic
a) (A) is between C1 and C4, (B) and(C) are be-
group
tween C1 and C6
30. Assertion: The two cyclic hemiacetal forms of glu-
b) (A) and (B) are between C1 and C4, (C) is be-
cose,  -form and  -form are called anomers.
tween C1 and C6

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Daily Practice Paper 123 BIOMOLECULE
Reason: Anomers differ only in the configuration of 8. Which of the following is not an oligosaccharide
the hydroxyl group at C-1. a) Xylose b) Maltose
31. Assertion: Sucrose is a non reducing sugar c) Raffinose d) Sucrose
Reason: Sucrose is a disaccharide formed by 9. A Laevorotatory sugar present in fruits is
glycosidec linkage between C-1 of   glucose and a) Glucose b) Fructose
c) Sucrose d) Lactose
C-2 of   fructose .
10. Glucose is not
32. Assertion: Hydrolysis of sucrose brings about a a) a hexose b) a carbohydrate
change in sign of rotation from dextro to laevo. c) an oligosaccharide d) an aldose
Reason: Hydrolysis always changes the optical ro- 11. On heating glucose with Fehling solution, we get a
tation of a compound. precipitate whose colour is
a) Orange b) Red c) Black d) White
KEY 12. Glucose gives silver mirror test with Tollen’s reagent.
11)b 12)d 13)c 14)c 15)b 16)c 17)a It shows the presence of
18)c 19)a 20)c 21)c 22)b,d 23)b,d 24)b a) Carboxylic group b) Alcoholic group
25)a 26)c 27)c 28)c 29)d 30)a 31)a c) Ketonic group d) Aldehydic group
32)c 13. The reagent which forms crystalline osazone deriva-
tives with glucose is
a) Fehling’s solution b) Phenyl hydrazine
c) Benedict’s solution d) Hydroxylamine
14. When glucose is heated with nitric acid the product is
1. The smallest unit in living organism is
a) Lactic acid b) Saccharic acid
a) Organelle b) Tissue
c) Glycollic acid d) oxalic acid
c) Organ d) Biomolecule
15. Glucose when heated with CH3OH in presence of
2. Oxygen balance in the atmosphere is maintained by a
process called dry HCl gas gives  and  methyl glycosides
a) Photosynthesis b) Protein synthesis becasue it contains.
c) Respiration d) Fat synthesis a) a –CHO group b) a –CH2OH group
3. The materials required for photosynthesis are c) a ring structure d) Five –OH groups
a) CO2 and H2O b) Chlorophyll only 16. When hemiacetal reacts with alcohol the product is
c) CO2, H2O and sunlight a) dihemiacetal b) alcohol
d) CO2, H2O and sunlight and cholorophyll c) acetal d) Peptide
4. Biological reactions associated with positive G are 17. Freshly prepared   D–glucose solution has specific
called rotation +111o and after sometime it becomes
a) Exergonic b) Endergonic a) +52o b) +99o c) –92o d) None
c) Exothermic d) Endothermic 18. Which does not show matarotation?
5. Which one of the following is a pentose sugar? a) Glucose b) Fructose
a) Ribose b) Arabinose c) Maltose d) Sucrose
c) Lyxose d) All the three 19. Ring structure of glucose is due to formation of hemi-
6. Monosaccharides contain acetal and ring formation is in between
a) Six carbon atoms only a) C1 and C5 b) C1 and C4
b) Five carbon atoms only c) C1 and C3 d) C2 and C4
c) Four carbon atoms only 20. The wrong statement about glucose is
d) May contain 3 to 7 carbon atoms a) It has one 1o – alcoholic group
7. Raffinose on hydrolysis gives b) It has four 2o – alcoholic groups
a) glucose, fructose and lactose c) It has one aldehydic group
b) glucose, fructose and galactose d) It has one 3o – alcoholic groups
c) fructose, glucose and erithrose 21. Fructose contains
d) glucose, fructose and mannose a) 3 secondary alcoholic groups
b) One ketonic group

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Daily Practice Paper 124 BIOMOLECULE
c) 2 primary alcoholic groups d) All the above d) Two molecules of the same or different monosac-
22. Glucose and mannose are charides
a) Mirror images b) Anomers 34. Change in optical rotation of sucrose solution due to
c) Functional isomers d) Epimers hydrolysis is called
23. Anomers have different a) Specific rotation b) Inversion
a) Physical properties b) Melting points c) Rotatory motion d) Mutarotation
c) Specific rotation d) All of these 35. Inverted sugar is
24. The fischer projection of glyceraldehyde represents a) Optically inactive form of sugar
correct configuration in terms of D & L, R & S and d b) Equimolecular mixture of glucose and fructose
& 1 designations respectively c) Mixture of glucose and fructose
d) A variety of cane sugar
36. Which of the following is not a reducing sugar?
a) Glucose b) Sucrose
c) Lactose d) Maltose
37. The glycosidic linkage in carbohydrates is
a) D, R, d b) D, R, l a) Link between two carbon atoms in a carbohy-
c) D, S, d d) D, S, 1 drate by a covalent bond
25. Which of the following is called as Laevulose? b) Link between a carbon atom and an oxygen atom
a) Glucose b) Fructose c) Link between carbon atoms in a carbohydrate
c) Lactose d) Maltose through an oxygen atom formed by elemination
26. The sweetst sugar among the following is of water.
a) Fructose b) Glucose d) None of these
c) Sucrose d) Galactose 38. Identify the one which does not belong to the class to
27. For naturally occuring fructose, the configuration and which the other three belong based on hydrolysis
sign of specific rotation respectively a) Sucrose b) Fructose
a) D, – b) D, + c) L, – d) L, + c) Lactose d) Maltose
28. Glyceraldehyde and dihydroxy acetone are a pair of 39. Which among the following does not give a silver
a) Anomers b) Enantiomeres mirror test with Tollen’s reagent?
c) Functional isomers d) Epimers a) Fructose b) Glucose
29. According to CIP rules, the configuration of c) Galactose d) Sucrose
(+) – glyceraldehyde can be designed as 40. Sucrose molecule contains
a) R b) S c) D d) L a) a glucopyranose and a fructopyranose units
30. According to CIP rules, the configuration of chiral b) a glucopyranose and a fructofuranose units
carbon atoms in D – (+) – glucose are c) a glucofuranose and a fructopyranose units
a) 2S, 3S, 4R, 5R b) 2S, 3R, 4S, 5R d) a glucofuranose and a fructofuranose units
c) 2R, 3R, 4S, 5S d) 2R, 3S, 4R, 5R 41. Maltose consists of
31. Glucose and cane sugar can’t be distinguished by a) Only   D glucose units
a) Fehling’s solution b) Baeyer’s reagent b)  and   D Glucose units
c) Tollen’s reagent d) Benedict’s solution c) Glucose and fructose
32. In which of the following all are disaccharides? d) Fructose only
a) Maltose, Sucrose, Lactose 42. Which of the following is animal polysaccharide?
b) Maltose, Lactose, Glucose a) Amylopectin b) Glycogen
c) Glycogen, Lactose, Sucrose c) Amylose d) Cellulose
d) Starch, Maltose, Lactose 43. Amylose consists of
33. A disaccharide on hydrolysis gives
a) Branched chain of   D glucose units
a) Two molecules of the same monosaccharide
b) Two different monosaccharides b) Unbranched chain of   D glucose units
c) Three molecules of the same monosaccharide c) Units of sucrose
d) Unbranched chain of   D glucose units

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Daily Practice Paper 125 BIOMOLECULE
44. Amylopectin is a polymer of 56. Which of the following is a branched chain polysac-
a)   D Glucose b)   D glucose charide?
a) Cellulose b) Raffinose
c)   D fructose d)   D fructose c) Amylose d) Glycogen
45. In Amylopectin the linkage absent is 57. In majority of the cells, the principle biomolecules
a) C1 & C4 b) C1 & C6 undergoing oxidation during respiration are
c) C1 & C2 d) Both C1 & C6 and C1 & C4 a) Vitamins b) Fats
46. Direct conversion of starch into glucose may be car- c) Proteins d) Carbohydrates
ried out by 58. Which of the following monosaccharides is a pen-
a) fermentation with diastase tose.
b) fermentation with zymase a) Glucose b) Fructose
c) heating it with HCl c) Ribose d) Galactose
d) fermentation with maltase 59. List-I List-II
47. The intermediate compound in the conversion of starch Chemical property of Structure elucidation
to glucose is Glucose of Glucose
a) Lactose b) Maltose A) Acetylation 1) Presence of
c) Fructose d) Sucrose carbonyl group
48. Starch is turned to disaccharide in presence of B) Reaction with HCN 2) Six carbon atoms
a) Maltase b) Zymase straight chain
c) Diastase d) Lactase C) reaction with HI/P 3) Presence of
49. Which one of the following statements about starch 1o–alcohol group
is correct? D) Oxidation with HNO3 4) Presence of
a) It occurs in the cell wall of plants 5–OH group
b) It is a disaccharide Correct match is
c) It gives a dark blue colour with iodine solution A B C D
d) It gives an orange red precipitate on boiling with a) 1 2 3 4
Fehling’s solution b) 4 1 2 3
50. Saliva helps in the digestion of c) 3 1 2 4
a) fats b) starch d) 3 2 1 4
c) proteins d) vitamins 60. Which of the following reagents cannot distinguish
51. Which of the following carbohydrates is the essential between glucose and fructose?
constituent of cell wall? a) Tollen’s reagent b) Fehling’s solution
a) Starch b) Maltose c) Benedict’s solution d) All of these
c) Cellulose d) Sucrose 61. Oxidation of glucose with Ag2O gives
52. Cellulose is the polymer of a) D–Gluconic acid b) L-Glucaric acid
a) L–fructose b) D-fructose c) L-Gluconic acid d) L-Glucaric acid
c) D-glucose d) Amylose 62. Fructose gives the silver mirror test because it
53. Cellulose is rigid due to a) Contains an aldehyde group
a) Hydrogen Bonding b) Contains a keto group
b)  (1, 4) glycosidic linkage c) Undergoes rearrangement under the alkaline con-
c) cell wall material ditions of the reagent to form a mixture of glu-
d) vegetable matter cose and mannose
54. Which of the following can act as food storages and d) It has pyranose structure
structural materials? 63.   D  Glucose and   D  glucose differ from
a) Monosaccharides b) Disaccharides each other due to difference in one carbon with re-
c) Oligosaccharides d) Polysaccharides spect to its?
55. The carbohydrates are stored in animal bodies as a) Size of hemiacetal ring
a) Starch b) Amylum b) Number of OH groups c) Configuration
c) Glycogen d) Cellulose d) Conformation

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Daily Practice Paper 126 BIOMOLECULE
64. In an aqueous solution of D–Glucose the percentage 73. Which one of the following statements is not true for
of  and  anomers at equilibrium condition are glucose?
respectively a)   D (  )  glucose undergoes mutarotation
a) 80 and 20 b) 20 and 80 b) It has four asymmetric carbons in Fischer projec-
c) 36 and 64 d) 64 and 36 tion formula
65. Which of the following statement is correct about D c) It gives saccharic acid with Tollen’s reagent
– Glucose & D – Galactose compounds? d) It reacts with hydroxyl amine
a) They are diastereomers 74. Regarding lactose some statements are given below
b) Both are components of lactose A) On hydrolysis lactose gives   D – galactose
c) They are C – 4 epimers
d) All the above are correct and   D – glucose
66. D–Glucose shows mutarotation because, B) In lactose C1 of   D – galactose has acetal
a) it is dextrorotatory
structure and C1 of   D – glucose has hemi-
b) it undergoes inter conversion between it’s pyra-
nose structure and furanose structure acetal structure
c) it undergoes interconversion betwee it’s C) In lactose molecule   D – galactose is a
 and  (  ) Glucopyranose structures nonreducing unit and   D – glucose is a re-
d) it undergoes interconversion with D(–) fructose ducing unit
67. The number of chiral centres in the open-chain struc- The correct statements are
ture of Glucose is a) A, C b) A, B c) B, C d) A, B, C
a) 3 b) 4 c) 5 d) 6 75. List - I List-II
68. The number of chiral centres in the cyclic hemiacetal
A)  and  –D Glucose 1) Mutarotation
form of Glucose is
a) 3 b) 4 c) 5 d) 6 B) (+) and (–) Glucose 2) Enantiomers
69. The specific rotation of a freshly prepared solution of C) D and L–notations 3) Anomers
 –D–Glucose changes from a value of xo to a con- D)  form    form 4) configurational
stant value of yo. The values of x and y are respec- isomers
tively A B C D
a) 19o, 52.5o b) 111o, 52.5o a) 2 3 4 1
c) 5.5o, 19o d) 52.5o, 111o b) 2 3 1 4
70. The end product (B) formed in the reaction sequence. c) 3 2 4 1
d) 3 2 1 4
Glu cos e 
HCN
H O
 A 
HI , P

B
3 76. The two functional groups present in a typical carbo-
a) hexanoic acid b) hexane hydrate are:
c) heptane d) heptanoic acid a) –CHO and –COOH b) >C = O and –OH
71. With how many molecules of acetic anhydride does c) –COOH and >C=O d) –OH and –COOH
one molecule of glucose react? 77. Which one of the following statements is not true re-
a) 3 b) 4 c) 5 d) 6 garding (+) lactose? [AIPMT(s) 2011]
72. Incorrect statements among the following a) (+) lactose is a  -glucoside formed by the union
A) Sucrose is reducing non sugar
of a molecule of D(+) glucose and a molecule of D(+)
B) Two   D  glucose units in maltose a linked galactose
by 1, 4-linkage b) (+) lactose is a reducing sugar and does not exhibit
C)   D  glucose and   D  fructose units are mutarotation
linked by 1, 4–linkage in lactose c) (+) lactose, C12H22O11 contains 8-OH groups
D) All polysaccharides are reducing nonsugars d) On hydrolysis (+) lactose gives equal amount of
a) Only AB b) A, B, C, D D(+) glucose and D(+) galactose
c) A, C, D only d) A, B, C only 78. Which one of the following sets of monosaccharide’s
forms sucrose? [AIPMT(s) 2012]

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Daily Practice Paper 127 BIOMOLECULE
a)   |D-galactopyranose and   | 83. Match List-I with List-II (JEE Main 2021)
D-glucopyranose List-I List-II
b)   |D-glucopyranose and   | D-fructofuranose a) Sucrose i)   D  Galactose and
c)   | D-glucopyranose and   |D-fructofuranose   D  Glucose
d)   |D-glucopyranose and   | D-fructopyranose b) Lactose ii)   D  Glucose and
79. D(+) glucose reacts with hydroxylamine and yields   D  Fructose
an oxime. The structure of the oxime would be [2014]
c) Maltose iii)   D  Glucose and
  D  Glucose
Choose the correct answer from the options given
below:
a) a  iii, b  ii, c  i
a) b) b) a  i, b  iii, c  ii
c) a  ii, b  i, c  iii
d) a  iii, b  i, c  ii
84. Which of the following is correct structure of   ano-
mer of maltose? (JEE Main 2021)

a)
c) d)

80. Which one given below is a non-reducing sugar? b)

(2016)
a) Lactose b) Glucose
c) Sucrose d) Maltose
81. The difference between amylose and amylopectin is
[NEET 2018]
c)
a) Amylopectin have 1 | 4 | -linkage and
1 | 6  | -linkage
b) Amylose have 1 | 4 | -linkage and
1 | 6  | -linkage
d)
c) Amylopectin have 1 | 4 | -linkage and
1 | 6 | -linkage
d) Amylose is made up of glucose and galactose 85. A non-reducing sugar “A” hydrolyses to give two
82. Sucrose on hydrolysis gives [NEET 2020] reducing mono saccharides. Sugar A is
(JEE Main 2021)
a)   D  Glucose +   D  Glucose
a) Fructose b) Galactose
b)   D  Glucose +   D  Fructose c) Glucose d) Sucrose
86. Which of the glycosidic linkage between galactose
c)   D  Fructose +   D  Fructose
and glucose is present in lactose? (JEE Main 2021)
d)   D  Glucose +   D  Fructose a) C-1 of galactose and C-6 of glucose

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Daily Practice Paper 128 BIOMOLECULE
b) C-1 of glucose and C-6 of galactose d) A = C7H14O8, B = C6H14O6
c) C-1 of galactose and C-4 of glucose 92. For the below given cyclic hemiacetal (X), the cor-
d) C-1 of glucose and C-4 of galactose rect pyranose structure is: (JEE Main 2022)
87. Fructose is an example of: (JEE Main 2021)
a) Heptose b) Pyranose
c) Ketohexose d) Aldohexose
88. Compound A gives D-Galactose and D-Glucose on
hydrolysis. The compound A is: (JEE Mains 2021)
a) Amylose b) Sucrose
c) Maltose d) Lactose
89. Assertion: Sucrose is a disaccharide and a non-re-
ducing sugar.
Reason: Sucrose involves glycosidic linkage between
C1 of   glucose and C2 of   fructose.
Choose the most appropriate answer from the op-
tions given below: (JEE Main 2021)
a) Both (A) and (R) are true but (R) is not the true
explanation of (A).
b) (A) is false but (R) is true. a) b)
c) (A) is true but (R) is false.
d) Both (A) and (R) are true and (R) is the true ex-
planation of (A).
90. Given below are two statements. One is labelled as
Assertion A and the other is labelled as Reason R.
(JEE Main 2022)
Assertion : Amylose is insoluble in water. c) d)
Reason: Amylose is a long linear moelcule with more
than 200 glucose units.
93. Match List-I with Match List-II. (JEE Main 2022)
In the light of the above statements, choose the cor-
rect answer from the options given below.
a) Both A and R are correct and R is the correct
explanation of A.
b) Both A and R are correct but R is NOT the cor-
rect explanation of A.
c) A is correct but R is not correct
d) A is not correct but R is correct
91. The formulas of A and B for the following reaction
sequence (JEE Main 2022)

Choose the correct answer from the options given

below:
a) A-IV, B-I, C-II, D-III
b) A-IV, B-III, C-II, D-I
c) A-III, B-I, C-IV, D-II
d) A-I, B-III, C-IV, D-II
94. A sugar ‘X” dehydrates very slowly under acidic con-
a) A = C7H14O8, B = C6H14 dition to give furfural which on further reaction with
b) A = C7H13O7, B = C7H14 O resorcinol gives the coloured product after sometime.
c) A = C7H12O8, B = C6H14 Sugar ‘X’ (JEE Main 2022)

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Daily Practice Paper 129 BIOMOLECULE
a) Aldopentose b) Aldotetrose
c) Oxalic acid d) Ketotetrose
95. Which one of the following is a reducing sugar?

a) b)

c)

98. Given below are two statements. (JEE Main 2022)

d) Statement I: Maltose has two  -D-glucose units
linked at C1 and C4 and is a reducing sugar.
Statement II: Maltose has two monosaccharides:  -
D-glucose and  -D-glucose linked at C1 and C6 and
96. Glycosidic linkage between C1 of  -glucose and C2
it is a non-reducing sugar.
of  -fructose is found in (JEE Main 2022) In the light of the above statements, choose the cor-
a) Maltose b) Sucrose rect answer from the options given below:
c) Lactose d) Amylose a) Both Statement I and Statement II are true
97. Treatment of D-glucose with aqueous NaOH results b) Both Statement I and Statement II are false
in a mixture of monosaccharides, which are c) Statement I is true but Statement II is false
(JEE Adavanced 2022) d) Statement I is false but Statement II is true
99. When sugar ‘X’ is boiled with dilute H2SO4 in alco-
holic solution, two isomers ‘A” and ‘B’ are formed.
‘A” on oxidation with HNO3 yields saccharic acid
where as ‘B’ is laevorotatory. The compound ‘X’ is:
(JEE Main 2022)
a) Maltose b) Sucrose
c) Lactose d) Starch
100. Which of the given compound will not give Fehling
test? (JEE Main 2024)
a) Lactose b) Maltose
c) Sucrose d) Glucose

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Daily Practice Paper 130 BIOMOLECULE
101.List-I List-II (JEE Main 2024) 7. What is the effect of denaturation on the structure of
P  HI proteins?
(P) Glucose 
 
(1) Sacharic acid
NCERT EXAMPLER QUESTIONS
(Q)Glucose  NaHCO
  3
 (2) n-Hexane 8. Proteins are found to have two different types of sec-
Br2  H 2O ondary structures viz.  -helix and  -pleated sheet
(R) Glucose   (3) No Reaction
structures.  -helix structure of protein is establised
(S) Glucose 
Con HNO3
 (4) Gluconic acid by:
a) Peptide bonds b) van der Waals forces
a) P  2; Q  3; R  4; S  1
c) Hydrogen bonds d) Dipole-dipole interactions
b) P  2; Q  3; R  1; S  2
9. Each polypeptide in a protein has amino acids linked
c) P  3; Q  2; R  4; S  1
with each other in a specific sequence. This sequence
d) P  1; Q  2; R  3; S  4
of amino acids is said to be ......... .
a) primary structure of proteins
KEY b) secondary structure of proteins
EXERCISE-2 c) tertiary structure of proteins
1)d 2)a 3)d 4)b 5)d 6)d 7)b d) quaternary structure of proteins
8)a 9)b 10)c 11)b 12)d 13)b 14)b 10. Proteins can be classified into two types on the basis
15)c 16)c 17)a 18)d 19)a 20)d 21)d of their molecular shape, i.e., fibrous proteins and
22)d 23)d 24)a 25)b 26)a 27)a 28)c globular proteins. Examples of globular proteins are:
29)a 30)d 31)b 32)a 33)d 34)b 35)b a) Insulin b) Keratin c) Albumin d) Myosin
36)b 37)c 38)b 39)d 40)b 41)a 42)b 11. Amino acids are classified as acidic, basic or neutral
43)d 44)b 45)c 46)c 47)b 48)c 49)c depending upon the relative number of amino and
50)b 51)c 52)c 53)a 54)d 55)c 56)d carboxyl groups in their moelcule. Which of the fol-
57)d 58)c 59)b 60)d 61)a 62)c 63)c lowing are acidic?
64)c 65)d 66)c 67)b 68)c 69)b 70)c
71)c 72)c 73)c 74)d 75)c 76)b 77)b (CH 3 )2 CH  CH  COOH
78)b 79)d 80)c 81)c 82)b 83)b 84)c |
85)d 86)c 87)c 88)d 89)c 90)d 91)a a)
92)d 93)a 94)a 95)a 96)b 97)c 98)c NH 2
99)b 100)c 101)a
HOOC  CH 2  CH 2  CH  COOH

D.P.P.-37 b) |
NH 2
AMINOACIDS & PROTEINS
c) H 2 N  CH 2  CH 2  CH 2  COOH

HOOC  CH 2  CH  COOH
1. What are essential and non-essential amino acids?
Give two examples of each type. d) |
2. Define the following as related to proteins NH 2
i) Peptide linkage ii) Primary structure
iii) Denaturation 12. Lysine,H N  (CH )  CH  COOH is ....... .
2 2 4
3. What are the common types of secondary structure
|
of proteins?
4. What type of bonding helps in stabilising the  -helix NH 2
structure of proteins? a)  -Amino acid b) Basic amino acid
5. Differentiate between globular and fibrous proteins. c) Amino acid synthesised in body
6. How do you explain the amphoteric behaviour of amino
d)  -Amino acid
acids?

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Daily Practice Paper 131 BIOMOLECULE
13. In fibrous proteins, polypeptide chains are held to- a) cysteine b) glutamine
gether by ..... . c) serine d) leucine
a) van der Waals forces b) disulphide linkage 10. Essential amino acid among the following is
c) electrostatic forces of attraction a) Glycine b) Tryptophan
d) hydrogen bonds c) Alanine d) Proline
11. Imino acid among these compounds is
KEY a) Serine b) Proline
8)c 9)a 10)a,c 11)b,d 12)a,b 13)b,d c) Tyrosine d) Lysine
12. The number of amino acids found in proteins that a
human body can synthesize is
a) 20 b) 10 c) 5 d) 14
13. Which one of the following is not an essential anino
1. The functional group which found in amino acid is acid?
a) –COOH group b) –NH2 group a) Valine b) Leucine c) Lysine d) Alanine
c) –CH3 group d) both a & b 14. Among the following the basic amino acid is
2. The peptide linkage is a) Glycine b) Argenine c) Proline d) Cysteine
| | 15. Which of the following statement is not correct?
a) proteins are polyamides formed from amino ac-
a) CH  COO  NH  b) CH  CO  NH  ids
| b) except glycine, all other amino acids show optical
activity
c) CH  CH 2  CO  NH 2
c) natural proteins are made up of L-isomers of
| amino acids
d) in  amino acids, –NH2 and –COOH groups are
d) CH  NH  NH  CO  attached to different carbon atoms
3. Which of the following contains nitrogen? 16. For an aminoacid ‘X’, the isoelectric point is 6.1. Then
a) Fats b) Proteins ‘X’ is
c) Carbohydrates d) Hydrocarbons a) Acidic amino acid b) Basic amino acid
4. The building unit of all proteins are c) Neutral amino acid
a) monosaccharides b) lipids d) Acidic or basic amino acid
c) amino acids d) primary amines 17. Which of the following statement is not correct?
5. A tripeptide contains _____ peptide links a) amino acid can exist as inner salt
a) 3 b) 2 c) 6 d) 4 b) each polypeptide has one C-terminal and other
6. The structural feature which distinguish proline from N-terminal
 -amino acids is c) Enzymes are naturally occuring simple proteins
a) It is optically inactive d) The union of two amino acids produces two pep-
b) It contains aromatic group tide linkages
c) It is a dicarboxylic acid 18. The primary structure of a protein tells about
d) It is a secondary amine a) 3D arrangement of all atoms
7. Which of the following amino acids possesses a non- b) shape of poly peptide chain
polar side chain c) specific sequence of amino acids
a) isoleucine b) serine d) 3D arrangement of oligo peptide chains
c) cysteine d) glutamic acid 19. The dipeptide glycylalanine contains
8. Which of following amino acids contains a thiol group a) glycine as C-terminal residue
in the side chain b) glycine as N-terminal residue
a) methionine b) cysteine c) alanine as N-terminal residue
c) valine d) serine d) either (a) or (b)
9. The amino acid which contain a hydroxy group in the
side chain

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Daily Practice Paper 132 BIOMOLECULE
20.  -pleated structure of proteins is a) renaturation of proteins since it stabilises hydro-
phobic interactions
a) Primary structure b) Secondary structure
b) denaturation of proteins since it disturbs hydro-
c) Tertiary structure d) Quaternary structure
phobic interactions
21. The back bone for different segments in a protein is
c) renaturation of proteins since it maintains neces-
in the following form
sary isoelectric point
a)  -helix b)  -pleated c) coil d) 1 or 3
d) denaturation of proteins sice it causes cleavage
22. The helical structure of proteins is stabilized by
of O = C – N – H bonds
a) H-bonding b) Vander Waals’ forces
31. Which of the following is an example of “irreversible
c) ionic bond d) peptide bond
denaturation” of a protein?
23. Secondary structure of protein refers to
a) boiling egg b) change of amino acid
a) Mainly denatured proteins and structure of pros-
c) enzymatic action d) its synthesis
thetic groups
ASSERTION REASON TYPE :
b) Three-dimensional structure, especially the bond
a) Both A and R are true and R is the correct expla-
between amino acid residue that are distinct from
nation of A
each other in the polypeptide chain
b) Both A and R are true and R is not the correct
c) Linear sequence of amino acid residues in the
explanation of A
polypeptide chain
c) A is true but R is false
d) Regular folding patterns of continuous portions of
d) A is false but R is true
the polypeptide chain
32. A: Amino acids possess very high dipole moments in
24. The bond that determines the secondary structure of
the solid state
a protein is
R: Amino acids are ionic compounds.
a) Co-ordinate bond b) Covalent bond

c) Hydrogen bond d) Ionic bond 33. A: An amino acid, H 3 N CHRCOO  can act as an
25. Which of the following is a globular protein?
a) Collagen b) Myoglobin and Haemoglobin ampholyte.
c) Myosin d) Enzymes R: On treatment with acid, amino part (–NH2) of
26. Tertiary structure of a protein will lead the polypep- amino acid acts as a base and on treatment with base
tide chains to get the following shapes the acidic part (–COOH) of amino acid acts as an
a) linear, octahedral b) angular, tetrahedral acid
c) fibrous, globular d) fibrous, planar 34. A: tryptophan is a
27. Maximum possible hydrogen bonds are present in
a) 3, 613 Helix b) Keratin
c) Silk fibroin d)  – D – fructose
28. Mark the wrong statement about denaturation of pro-
heterocyclic amino acid and it doesn’t evolve N2 on
teins
treatment with HNO2
a) The primary structure of the proteins does not
R: Tryptophan consists of a secondary amino group
change
35. A: The pKa of the –COOH of alanine is much greater
b) Globular proteins are converted into fibrous pro-
than pKa of –COOH of CH3COOH
teins
R: The electron withdrawing inductive effect of N+
c) Fibrous proteins are converted into globular
stabailises the –COOH
d) The biological activity of the protein is cancelled
36. A: Lysine (PI = 9.6) and glycine (PI = 5.97) could be
29. The restriction of the biological nature and activity of
separated by electrophoresis
proteins by heat or chemical agent is called
R: In the electrophoresis process if the pH of the
a) dehydration b) denaturation
solution is maintained either at 9.6 or 5.97, one will
c) deamination d) denitrogenation
migrate towareds electric pole while other wouldn’t
30. Addition of an electrolyte such as sodium dodecyl
sulphate causes

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Daily Practice Paper 133 BIOMOLECULE
37. A: In an electric field, an amino acid migrate towards 48. The pH at which an amino acid carries no net charge
cathode when pH > PI is called it’s
R: When pH is greater than PI anionic form of amino a) isoelectric point b) inversion point
acid predominates c) neutralisation point d) triple point
38. A: Amino acids are least soluble in water when pH
49. A codon has a sequence of A , and specifices a par-
is equal to PI
R: At isoelectric point, the covalency of amino acid ticular B that is to be incorporated into a C . What
dominates
39. A: An aqueous solution of glycine of pH = 7 is not are A, B , C ?
electrically neutral A B C
R: The isoelectric point of glycine, PI is 6.0 a) 3 bases amino acid carbohydrate
40. A: Alanine is one of the basic units of protein b) 3 acids carbohydrate protein
R: All kinds of amino acids are considered basic units c) 3 bases protein amino acid
of protein d) 3 bases amino acid protein
41. The end products of protein digestion are 50. For a neutral amino acid (X), isoelectric point is 5.8.
a) Peptides b) Monosaccharides Now its solubility at this point in water is
c) Lipids d)   Amino acids a) maximum b) minimum
42. Which of the following amino acids does not corre- c) zero d) unpredictable
spond to the general formula given below R – CH 51. Which of the following does not exit as a zwitter ion?
(NH2) – COOH a) Glycine b) Alanine
a) Cysteine b) Proline c) Sulphanilic acid d) Picric acid
c) Argenine d) Glutamic acid 52. Which of the following molecule is capable of form-
43. IUPAC name of Glycine is ing zwitter ion?
a) 2–amino propanoic acid a) CH3 – CHOH – NH2 b ) N H 2 C H 2 C O O H
b) 2–amino butanoic acid c) CH3 – COOH d) CCl3 – NO2
c) 2–amino ethanoic acid 53. If the amino group of Glycine and carboxylic acid
d) 2–amino pent–1, 5–dioic acid group of Alanine undergo elimination of water
44. Among Valine, Leucine, Isoleucine, Lysine and phe- moleculae, the name of the compound thus formed is
nyl alanine, odd member is a) Alanylglycine (dipeptide)
a) Leucine since others are acidic b) Glycyl alanide (tri peptide)
b) Valine since others are basic c) Glycyl alanine (dipeptide)
c) Isoleucine since others are optically active d) Alanineglycine (dipeptide)
d) Lycine since others are neutral 54. Which of the following belongs to oligo peptides?
45. D-Alanine differs from L-Alanine with respect to a) Toxin b) effective hormone
a) configuration b) chemical formula c) DNA d) t-RNA
c) number of –NH2 groups 55. Number of peptide linkages in the artificial sweetner
d) number of –COOH groups “aspartame” is
46. In L-Phenyl alanine the amino group lies at a) 2 b) 21 c) 1 d) 11
a) right side to chiral centre 56. The number of tripeptides formed by three different
b) left side to chiral centre amino acids are
c) para position to –COOH in benzene ring a) Three b) Four c) Five d) Six
d) ortho position to –COOH in benzene ring 57. regarding secondary structure of a protein, correct
47. Nature of aqueous solutions of two different amino statement(s) is/are
acids X and Y are acidic and basic. Now X and Y are A) peptide bonds possess regional planarity
a) Alanine and Valine B) C = O and –NH– of different peptide chains are
b) Aspartic acid and Aspargine held by Vander Waals attractions
c) Glutamine and Glutamic acid C) closely packed arrangement so as to minimise
d) Aspartic acid and Lysine repulsion between “R” groups

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Daily Practice Paper 134 BIOMOLECULE
a) Only C b) Only B 68. The structural feature which distinguishes proline from
c) A and B only d) A and C only natural  –amino acids is that
58. Proteins contain the following chemical linkages in a) proline is optically inactive
addition to –CO–NH– linkages b) proline contains an aromatiac group
a) NH -----O = C b) –HS = SH– c) proline is dicarboxylic acid
c) C = N ---- H–O– d) –O–O– d) proline is a secondary amine
59. The secondary structure of a protein refers to 69. Which amino acid is achiral?
a) hydrophobic interactions a) Alanine b) Valine c) Proline d) None of these
b) sequence of  -amino acids 70. Which is not a true statement?
c) fixed configuration of the polypeptide backbone a)  –carbon atom of  -amino acids is asymmet-
d)  –helical backbone ric except in glycine
60. In a protein, the different types of attractions that exist b) All proteins contain  -amino acids of L-configu-
are ration
A) H bonding B) hydrophobic c) Human body can synthesize all proteins they need
C) ionic D) covalent d) At pH = 7 both amino group and carboxylic group
a) B, C and D only b) hydrophobic exists in the ionised form
c) A, B and C only d) covalent 71. Which of the following structure represents the pep-
61. Proteins cannot be denatured by the addition of tide chain?
a) water b) acids c) detergents d) heat
62. Denaturation of protein leads to loss of its biological
activity by
a) Formation of amino acids
b) Loss of primary structure
c) Loss of both primary & quatenary structures
d) Loss of both secondary and tertiary structures
63. Amino acids usually exist in the form of Zwitter ions.
This means that they consist of
a) the basic NH2 group and acidic COOH group
b) the basic NH3+ group and the acidic COO– group
c) basic COO– group and acidic NH3+ group
d) no acidic or basic gorup as such
64. consider in the compound given: 72. All common amino acids except one react with cold
nitrous acid (HNO2) and evolve nitrogen gas, that
amino acid is
. The correct order of acidic a) cysteine b) proline
c) histidine d) None of these
nature of the positions X, Y, Z is 73. The amino acid cysteine often forms a disulphide bond
a) Z > X > Y b) X > Y > Z with another nearby cysteine. The reaction is best
c) X > Z > Y d) Y > X > Z classifed as
65. One of the essential alpha amino acids is a) an addition b) a substitution
a) Lysine b) glycine c) serine d) proline c) an oxidation d) a reduction
66. The pH value of a solution in which a polar amino 74. Which of the following is not a amino acid?
acid doesn’t migrate under the influence of an elec- a) Glycine b) Alanine
tric field is called c) Histidine d) Benzidine
a) isoelectronic point b) isoelectric point 75. Peptides on hydrolysis gives
c) neutralisation point d) None of these a) amines b) amino acids
67. An amino acid which contain secondary amine group c) ammonia d) alcohols
is 76. Peptides are composed of amino acids joined by amide
a) serine b) proline c) tyrosine d) lysine bonds. Which of the following statements is not cor-
rect?

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Daily Practice Paper 135 BIOMOLECULE
a) Amide groups are more resistant to hydrolysis than
are similar ester groups
b) p-  resonance stabilises the amide bond
c) Stable conformations of peptide are restricted to
those having planar amide groups
d) Amide groups doesnot participate in hydrogen
bonding
77. Which of the following is used in a colour test of amino
acid?
a) Ninhydrin b) Cyanogen bromide
c) Trypsin d) Chymotrypsin
78. Isoelectric point is
a) the pH at which all molecular species are ionised
and that carry the same charge
b) the pH at which all molecular species are neutral
and uncharged 82. In an electric field, if an amino acid migrates towards
c) the pH at which half the molecular species are cathode, the pH of the solution is said to be
ionised (charged) and other half unionised a) less than PI b) more than PI
d) the pH at which negatively and positively charged c) equal than PI d) 7 (seven)
molecular species are present in equal concen- 83. During the process of digestion, the proteins present
tration in food materials are hydrolysed to amino acids. The
two enzymes are invovled in the process
Proteins 
Enzyme-A
 Polypeptides 
Enzyme-B

79. Histidine has pKa1 = 1.8, amino acids are respectivley.
a) pepsin and trypsin b) invertase and zymase
c) amylase and maltase d) diastase and lipase
84. The helical structure or a secondary structure of pro-
pKa2 = 9.2 and pKa3 = 6.0. the isoelectric point. PI of teins is stabilised by
histidine is likely to be a) peptide bonds b) dipeptide bonds
a) in between 1.8 and 6.0 c) H-bond d) ether bonds
b) in between 6.0 and 9.2 85. Proteins give
c) below 1.8 d) above 9.2 a) a violet colour with alkaline CuSO4 solution
80. Glutamic acid, H2N – CH(CH2CH2COOH).COOH b) a purple colour on boiling with dilute ninhydrin
has pKa1, (  –COOH) = 2.2, pKa2 (  –NH3) = 9.8 solution
and pKa3 (R group COOH) = 4.3. The isoelectric point c) yellow colour on boiling with HNO3
of glutamic acid is d) All the above
a) 5.9 b) 7 c) 10.2 d) 3.25 86. The destruction of the biological nature and acitivity
81. Which of the following is the major solute species in of proteins by heat or chemical agent is called
a solution of lysine at pH = 10.5 (PI = 9.6) ? a) dehydration b) denaturation
c) denitrogenation d) deamination
87. The primary structure of protein is based upon the
a) hydrogen bonding b) vander Waal’s attraction
c) ionic bonding d) covalent bonding
88. Which of the following statements is/are wrong
a) All amino acids are optically active
b) Most of the naturally occuring amino acids are
L–amino acids
c) Glycine is optically inactive

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Daily Practice Paper 136 BIOMOLECULE
d) All amino acids contain a primary amino group molecular species are present in equal concen-
except proline tration
89. Which of the following amino acids contains sulphur 95. At isoelectric point, amino acid is present as
in its structure 
a) Proline b) Cysteine a) H2 N  CH  COOH b) H N CH  COO
3
c) Leucine d) Histidine | |
90. R  CH  COOH 
 A . The product A is
HNO2
R R
|

NH 2 c) N H  CH  COOH d) H2 N  CH  COO
3

a) RCH2 COOH b) RCH2 NH2 | |

c) RCH(OH) COOH d) R CH(OH) CH2OH R R
91. Which statement about the zwitterionic form of an
96. Which of the following is the major solute species in
amino acid is correct?
a solution of alanine at pH = 2? (pI = 6)
a) The zwitter ion acts only as a base
b) The zwitter ion caries an overall charge which
can be positive or negative
c) The zwitter ion is neutral overall
d) The zwitter ion acits only as an acid
92. You have a mixture of three amino acids: E(pI = 3.2),
Y(pI = 5.7) & K(pI = 9.7) Under electrophoresis at
pH = 7.7, in which direction will each component of
the mixture move?
a) E to anode; Y & K to cathode
b) E to anode; Y stationary; K to cathode
c) E to cathode; Y stationary; K to anode
d) E & Y to anode; K to cathode 97. Which of the following is the major solute species in
93. Which of the following statements is true for pheny- a solution of alanine at pH = 6?
lalanine in an aqueous solution at pH = pI?
a) The nonpolar, neutral species
C6H5CH2CH(NH2)CO2H is the most abundant
solute
b) The concentrations of [+] and [–] charged mo-
lecular ions are equal.
c) Racemization is rapid
d) This condition is impossible, since pH can never
equal pI
94. Which of the following statements most correctly
defines the isoelectric point?
a) The pH at which all molecular species are ion- 98. In a protein molecule various amino acids are linked
ized and that carry the same charge together by: (NEET 2016]
b) The pH at which all molecular species are neu-
a)   glycosidic bond b)   glycosidic bond
tral and uncharged
c) The pH at which half the molecular species are c) peptide bond d) dative bond
ionized (charged) and the other half unionized 99. Which of the following compounds can form a zwit-
d) The pH at which negatively and positively charged terion? (NEET 2018)
a) Benzoic acid b) Acetanilide
c) Aniline d) Glycine

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Daily Practice Paper 137 BIOMOLECULE
100.The non-essential amino acid among the following is:
(NEET 2019) KEY
a) Alanine b) lysine c) Valine d) leucine EXERCISE-2
101.Which of the following is a basic amino acid? 1)d 2)b 3)b 4)c 5)b 6)d 7)a
(NEET 2020) 8)b 9)c 10)b 11)b 12)b 13)d 14)b
a) Alanine b) Tyrosine c) Lysine d) Serine 15)d 16)c 17)d 18)c 19)b 20)b 21)d
102.The structure of protein that is unaffected by heating 22)a 23)d 24)c 25)b 26)c 27)a 28)c
is (JEE Main 2022) 29)b 30)b 31)a 32)c 33)b 34)d 35)c
a) Secondary structure b) Tertiary structure 36)a 37)d 38)c 39)a 40)c 41)d 42)b
c) Primary structure d) Quaternary structure 43)c 44)d 45)a 46)b 47)d 48)a 49)d
103.Which of the following is not an example of fibrous 50)b 51)d 52)b 53)a 54)b 55)c 56)d
protein? (JEE Mains 2021) 57)d 58)b 59)d 60)c 61)a 62)d 63)c
a) Keratin b) Albumin 64)b 65)a 66)b 67)b 68)d 69)d 70)d
c) Collagen d) Myosin 71)c 72)b 73)c 74)d 75)b 76)d 77)a
104.The water soluble protein is: (JEE Main 2021) 78)d 79)b 80)d 81)d 82)a 83)a 84)c
a) Fibrin b) Albumin c) Myosin d) Collagen 85)d 86)b 87)d 88)a 89)b 90)c 91)c
105.Sellwanoff test and Xanthoproteic test are used for 92)d 93)b 94)d 95)b 96)a 97)c 98)c
the identification of ____ and ____ respectively. 99)d 100)a 101)c 102)c 103)b 104)b 105)a
(JEE Main 2021) 106)4 107)1 108)4 109)8 110)6
a) Ketoses, proteins b) Proteins, ketoses
c) Aldoses, ketoses d) Ketoses, aldoses
106.The total number of negative charge in the tetrapep- D.P.P.-38
tide, Gly-Glu, Asp-Typ-Tyr, at pH 12.5 will be _____.
(Integer answer) (JEE Main 2021) VITAMINS
107.In a linear tetrapeptide (Constituted with different
amino acids), (number of amino acids) - (number of
peptide bonds) is ______. (JEE Main 2022)
1. How are vitamins classified? Name the vitamin re-
108.In alanylglutamylglycylalanylleucine, the number of
sponsible for the coagulation of blood.
peptide linkage is ______. (JEE Main 2022)
2. Why are vitamin A and vitamin C essential to us?
109.Total number of tripeptides possible by mixing of va-
Give their importance sources.
line and proline is ______. (JEE Main 2023)
3. Which of the following acids is a vitamin?
110. Number of non-cyclic tripeptides formed by using 3
a) Aspartic acid b) Ascorbic acid
amino acids without repeating them is
c) Adipic acid d) Saccharic acid
(JEE Main 2024)
4. Which of the following B-group vitamins can be stored
in our body?
a) Vitamin B1 b) Vitamin B2
c) Vitamin B6 d) Vitamin B12
5. Assertion: VItamin D cannot be stored in our body.
Reason: Vitamin D is fat soluble vitamin and is ex-
creted out of the body with urine.
a) If both assertion and reason are true and reason is
the correct explanation of assertion.
b) If both assertion and reason are true but reason is
not the correct explanation of assertion.
c) If assertion is true but reason is false.
d) If both assertion and reason are false.

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Daily Practice Paper 138 BIOMOLECULE
14. Which of the following vitamin is known as Nicotinic
KEY acid?
3)b 4)d 5)d a) B 1 b) B2 c) B3 d) B5
15. Defficiency of the following vitamin leads to pellagra
a) A b) B2 c) B3 d) C
16. Which of the following vitamin acts as important com-
ponent of NADP (&) DPN?
1. Water soluble vitamins are a) A b) D c) B5 d) B12
a) A, D b) E, K c) D, E d) C, B 17. The following vitmain plays a role in transportation of
2. Which one of the following is a source of vitamin amino acids across the cell membrane.
“A”? a) B 1 b) B2 c) B3 d) B6
a) Milk b) Carrot c) Fish d) all 18. Convulsion is due to deficiency of vitamin
3. Night blindness is due to the deficiency of a) B 1 b) B2 c) B5 d) B6
a) Vitamin A b) Hormones
c) Vitamin B12 d) Riboflavin 19. The cheaf source of vitamin “H” is
4. The chief source of vitamin D is a) Yeast b) Citrous fruit
a) Fish liver oil b) Spinach c) Rice polish d) Cereals
c) Cow dung d) Citrous fruit 20. Deficiency of vitamin “H” leads to
5. Antiricketic vitamin is a) Dermatitis b) Loss of hair
a) Vitamin A b) Vitamin B12 c) Increase of blood cholesterol d) All of these
c) Vitamin C d) Vitamin D 21. Which of the following vitamin involves in the syn-
6. Sterol, the basic unit of vitamin D, consists of 4 rings thesis of RNA?
they are a) A b) B c) C d) B9
a) Three 6-carbon rings one five carbon ring 22. Vitamin B is rich in
b) Three 5-carbon rings one six carbon ring a) Sewage sludge b) Liver of pig
c) Four 6-carbon rings only c) Egg d) all
d) Four 5-carbon rings only 23. Formation of RBC is because of
7. Calcium absorption in intestine is the function of a) Mucoprotein b) Vitamin B12
a) Vitamin A b) Vitamin B c) Vitamin C d) Both 1 & 2
c) Vitmain C d) Vitamin D 24. Ascorbic acid resembles the structure of
8. Anti sterility factor which is necessary for fertility of a) Vitamin A b) Glucose
men and birth process of the female is c) Cellulose d) Vitamin D
a) Vitamin E b) Vitamin A 25. Deficiency of Vitamin “C” leads to
c) Vitmain C d) Vitmain D a) gum swelling
9. Deficiency of Vitamin E leads to b) blead easily and teeth become loose
a) Neurosis of heart muscles c) delay in wound healing d) all
b) Degeneration of lacrymal gland 26. Dark red tongue, fissuring at corners of mouth and
c) Beri-Beri d) Dermatitis lips are the symptoms of the deficiency of which vi-
10. In all green leaves and vegetables which of the fol- tamin
lowing vitamin is available? a) C b) A c) B2 d) D
a) Vitamin A b) Vitamin D 27. Some examples are given in List-II and their type is
c) Vitmain K d) Vitamin B12 given in List-I
11. Which of the following vitamin is Naphthaquinone List-I List-II
derivative? 1) Lipid A) Histidine
a) A b) B c) D d) K 2) Protein B) Ascorbic acid
12. Anti haemorrhagic vitamin is 3) Amino acid C) Cephalin
a) A b) B c) D d) K 4) Hormone D) Insulin
13. Deficiency of vitamin B2 leads to 5) Vitamin
a) Bow legs b) Cheilosis A B C D
c) Pellegra d) Vision loss a) 4 1 2 5
b) 3 2 5 1

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Daily Practice Paper 139 BIOMOLECULE
c) 3 5 1 4 a) I-B; II-A; III-C, IV-E
d) 3 4 1 2 b) I-B; II-A; III-E; IV-D
28. Vitamin B6 is know as c) I-A; II-B; III-E; IV-C
a) Pyridoxine b) Thiamine d) I-C; II-B; III-A; IV-D
c) Tocopherol d) Riboflavin 41. Match List-I with List-II and select the correct an-
29. Vitamin D is called swer using the codes given below:
a) Ascorbic acid b) Calciferol or ergocalciferol List-I List-II
c) Thiamine d) Riboflavin I)Anti-beriberi factor A)Vitamin C
30. Vitamin E is also called II) Pancreas B)Glycerides
a) Cyanocobalamin b) Tocopherol III) Palm oil C)Vitamin B1
c) Lactoflavin d) Ascorbic acid IV)L (+) – Ascorbic acid D)Insulin
31. Which of the following vitamin is not soluble in wa- a) I-C; II-D; III-B; IV-A
ter? b) I-C; II-D; III-A; IV-B
a) C b) B1 c) B2 d) D c) I-A; II-B; III-D; IV-C
32. The best source of vitamin C is d) I-A; II-B; III-C; IV-D
a) Cod liver oil b) Egg yolk 42. Match List-I (name of vitamin) with List-II (deficiency
c) Citrous fruits d) Fish liver oil result/disease) and select the correct answer using
33. The deficiency of vitamin K causes the codes given below.
a) Haemorrhage List-I List-II
b) Lengthening time of blood clotting I)Ascorbic acid A)Beri-Beri
c) Inflammation of tunge d) Both a and b II) Retino B)Cracked lips
34. Milk contains vitamins III) Riboflavin C)Scurvy
a) A, D and E b) A, B12 and D IV)Thiamine D)Night blindness
c) C, D and K d) B1, B2 and D a) I-B; II-A; III-C; IV-D
35. Nervousness anaemia is caused by the deficiency of b) I-A; II-B; III-C; IV-D
vitamin c) I-D; II-C; II-B; IV-A
a) B 1 b) B2 c) B6 d) B12 d) I-C; II-D; III-B; IV-A
36. Deficiency of vitamin E causes 43. Match the following
a) Scurvy b) Loss of appetite List-I List-II
c) Loss of sexual power and reproduction A) B 1 I)Riboflavin
d) Beri Beri B) B 2 II)Pantothenic acid
37. Which of the following is a fat soluble vitamin? C) B 3 III)Niacin
a) Vitamin A b) Riboflavin D) B 5 IV)Thiamine
c) Pyridoxine d) Thiamine The correct match is
38. The metal present in vitamin B12 is A B C D
a) Iron b) Manganese a) IV I III II
c) Cobalt d) Magnesium b) IV III I II
39. The deficiency of which of the following vitamins c) III IV II I
adversely affects eye sight? d) IV I II III
a) A b) D c) B12 d) E 44. Which one of the following is Retinol?
40. Match items List-I with those in List-II from the com- a) Vitamin A b) Vitamin C
binations shown: c) Vitamin B1 d) Vitamin B6
List-I List-II 45. The condition of vitamin deficiency is known as
I)Saliva A) Genetic material a) Vitaminosis b) Avitaminosis
II) Nucleic acid B) Digestive enzyme c) Both a and b d) Anemea
III) Ascorbic acid C) Antibiotic 46. The organic compound which is required in minute
IV)Testosterone D) Sex hormone quantities in order to maintain good health of the liv-
E) Vitamin ing organism is:
a) Vitamin b) Protein
c) Lipid d) Carbohydrate

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Daily Practice Paper 140 BIOMOLECULE
47. Vitamin A deficiency causes a) Vitamin B2 b) Vitamin B2
a) Beriberi b) Night blindness c) Vitamin B6 d) Vitamin B12
c) Rickets d) Sterility 60. The RBC deficiency is deficiency disease of:
48. Vitamin B1 deficiency causes a) Vitamin B6 b) Vitamin B1
a) Beriberi b) Night blindness c) Vitamin B2 d) Vitamin B12
c) Rickets d) Sterility 61. Deficiency of vitamin K causes: (JEE Main 2021)
49. Vitamin D deficiency causes a) Cheilosis b) Decrease in blood clotting time
a) Sterility b) Xerophthalmia c) Increase in blood clotting time
c) Rickets d) Beriberi d) Increase in fragility of RBC’s
50. The vitamin which is water soluble and act as anti- 62. From the vitamins A, B1, B6, B12, C, D, E and K, the
oxidant is number of vitamins that can be stored in our body is
a) A b) B c) D d) C _____.
51. Which one of the vitamin is synthesised in our body
by using sun rays? KEY
a) A b) B complex c) C d) D EXERCISE-2
52. Which one of the following statements is true regard- 1)d 2)d 3)a 4)a 5)d 6)a 7)d
ing vitamin? 8)a 9)a 10)c 11)d 12)d 13)b 14)c
a) Vitamins are needed in large amounts to maintain 15)c 16)c 17)d 18)d 19)a 20)d 21)d
good health 22)b 23)b 24)b 25)c 26)c 27)c 28)a
b) Vitamins are secreted by ductless glands 29)b 30)b 31)d 32)c 33)d 34)d 35)d
c) Vitamins A, D, E, K are fat soluble and vitamins 36)c 37)a 38)c 39)a 40)b 41)a 42)d
B complex and C are water soluble 43)a 44)a 45)b 46)a 47)b 48)a 49)c
d) All vitams are synthesised in humans body 50)d 51)d 52)c 53)c 54)b 55)a 56)a
53. Which one of the following statements is incorect 57)c 58)c 59)d 60)d 61)c 62)6
regarding vitamins?
a) Vitamin A is essential for growth and vision
b) Vitamin D is essential for development of bones D.P.P.-39
c) A red coloured carotene in the body breaks into
vitamin C ENZYMES & HORMONES
d) Vitamin K is essential for blood coagulation
54. The vitamin which is water soluble is [2007]
& LIPIDS
a) Vitamin K b) Vitamin B
c) Vitamin E d) Vitamin D
55. Which of the following is not a fat soluble vitamin? 1. What are enzymes?
[AIPMT (M) 20011] 2. Which of the following terms are correct about en-
a) Vitamin-B complex b) Vitamin-D zyme?
c) Vitamin-E d) Vitamin-A a) Proteins b) Dinucleotides
56. Anaemia is caused by the deficiency of vitamin. c) Nucleic acids d) Biocatalysts
a) B12 b) B6 c) B1 d) B2 Assertion and Reason
57. Which of the vitamins given below is water soluble? a) If both assertion and reason are true and reason is
[2015] the correct explanation of assertion.
a) Vitamin K b) Vitamin E b) If both assertion and reason are true but reason is
c) Vitamin C d) Vitamin D not the correct explanation of assertion.
58. Among the following which vitamin deficiency causes c) If assertion is true but reason is false
rickets (bone deficiency) is [2013] d) If both assertion and reason are false.
a) Vitamin A b) Vitamin B 3. Assertion: All enzymes found in cells are invariably
c) Vitamin D d) Vitamin C proteins which catalyse biological reactions.
59. Which one of the following is a water soluble vitamin, Reason: Enzymes act efficiently at a moderate tem-
that is not excreted easily? perature and pH.

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Daily Practice Paper 141 BIOMOLECULE
4. Assertion: In presence of enzyme, substrate molecule 10. Which of the following is not belonging to lipids?
can be attacked by the reagent effectively. a) carbohydrates b) oils c) fats d) waxes
Reason: Active sites of enzymes hold the substrate 11. In plants, lipids occur in
molecule in a suitable position. a) fruits b) nuts c) seeds d) all the above
12. Esters of glycerol with long chain fatty acids are called
KEY a) homo lipids b) simple lipids
2)a,d 3)b 4)a c) triglycerides d) all the above
13. Lipids are stored in
A) Liver B) Muscles
C) Adipose tissues D) Bone marrow
The correct combination is
a) Only C b) Only D
1. Enzymes are c) C and D only d) All
a) Complex nitrogenous substances produced in liv- 14. The digestion of fats in the intestine is aided by
ing cells a) Peptisation b) Emulsification
b) Steroids c) Diffusion d) Protection
c) Living organisms d) Dead organism 15. Which one of the following acts as an emulsifier in
2. The non-protein portion of a protein is called lipid metabolism?
a) Functional b) Characteristic group a) Amino acid b) Fatty acid
c) Prosthetic d) Enolic group c) Bile acid d) Gluconic acid
3. The prosthetic group attached to the enzymes of vi- 16. Hydrolysis of fats and oils in the body produces
tamin B12 at the time of reaction is a) Ester b) Adipase
a) cellulose b) 5–deoxy adenosyl c) Carbon dioxide d) Carboxylic acid
c)  –methyl aspartic acid d) glutamic acid 17. The most efficient source of energy in the human
4. The function of enzymes in the living system is to body is
a) transport oxygen a) Fats b) Sugars
b) provide immunity c) Proteins d) Nucleic acids
c) catalyse biochemical reactions 18. The fat   oleo-   palmito-    stearin is an
d) provide energy example of
5. Which one of the following is not a protein? a) tri glyceride b) simple lipid
a) Wool b) Nail c) Hair d) DNA c) mixed fat d) all the above
6. Enzymes belong to which class of compounds? 19. Mixed fat with symmetrical nature is -----
a) Polysaccharides b) Polypeptides
a)  ,   Dipalmitin b)  ,  , -Dipalmitin
c) Polynitro heterocyclic d) Hydrocarbons
7. Enzymes are made up of c)  ,  1  Dipalmito,  -stearin
a) Edible proteins
b) Proteins with specific structure d)  ,   Diapalmito,  1  stearin
c) Nitrogen containing carbohydrates 20. Unsymmetrical simple lipid is ----
d) Carbohydrates a) 1-Palmitin b) 2-Palmitin
8. Regarding enzymes, incorrect statement is c) 1, 3-Dipalmitin d) 1, 3–Dipalmito, 2-stearin
a) an enzyme is generally a protein
b) an enzyme may be conjugated protein 21. CH 2  O  CO  C15 H 31
c) enzyme gets deactivated during reactions |
d) enzyme gets activated during reactions CH  O  CO  C17 H 33
9. Lipids are |
a) Nucleic acids occuring in plants
b) Proteins occuring in animals CH 2  O  CO  C17 H 35
c) Carbohydrates occuring in plants This neutral lipid is called as
d) Fats of natural origin

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Daily Practice Paper 142 BIOMOLECULE
a)  -palmito,  -oleo,  1 -stearin 34. A carbohydrate, galactose is present in
a) Terpenes b) Glycerophosphatides
b)  -oleo,  -palmito,  1 -stearin c) Glycolipids d) Phosphoinositides
c)  -stearo,  -oleo,  1 -palmitin 35. Terpenes are
A) Polymers of 5–carbon units called isoprenes
d)  -palmito,  -oleo,  -stearin
B) The side chains of vitamins A, E, K
22. Waxes are esters of higher fatty acids with long chain C) Carotenes
a) Monohydric alcohols b) Dihydric alcohols The correct combination is
c) Trihydric alcohols d) All the three above a) Only A b) A, B & C
23. The triglycerides of which of the following unsatur- c) Only B d) Only C
ated fatty acids are not present in oils and fats? 36. Sphingol is
a) Oleic acid b) Linoleic acid a) An amino acid b) A fatty acid
c)  -Linoleic acid d) Formic acid c) A complex amino alcohol
24. Ester of myricyl alcohol with palmitic acid is present d) A long chain monohydric alcohol
in 37. Terpenses belong to
a) Animal fur b) Bee’s wax a) compound lipids b) glycolipids
c) Sperm whale oil d) Wool c) simple lipids d) derived fats
25. Linoline fat is an ester of cholesterol with 38. Polymers of isoprene are called
a) long chain alcohol b) phosphoric acid a) glycolipids b) waxes
c) long chain fatty acid d) glycerol c) derived fats d) terpenes
26. Which of the following is an unsaturated acid 39. Bile acid, cholesterol and vitamin – D belong to
a) Linoleic acid b) Stearic acid a) simple lipids b) compound lipids
c) Caproic acid d) Archidic acid c) derived fats d) glycolipids
27. Which of the following lipids can insulate nerve im- 40. Molecular formula of cholesterol is
pulse? a) C 27 H 45 OH b) C28H43OH
a) Simple lipids b) Phospholipids c) C27H43OH d) C28H45OH
c) Glycolipids d) Terpenes 41. Which of the following lipid does not contain phos-
28. Lecithin and cephalin are phoric acid?
a) Neutral fats b) Glycolipids a) Lecithin b) Cephalin
c) Waxes d) Phospholipids c) sphingomyelins d) glycolipids
29. Which one of the following is not a lipid? 42. Ergosterol and cholesterol are _____ respectively
a) Lecithin b) Spingomyelins a) Derived fat and derived fat
c) Insulin d) Cephalin b) Compound fat and derived fat
30. Which of the following is not a wax? c) Derived fat and compound fat
a) Myricyl palmitate b) Tripalmitin d) Simple lipid and hetero lipid
c) Myricyl cerote d) Cetyl palmitate 43. Which of the following substance acts as stimulator?
31. Formula of linolenic acid is C17H29.COOH. The a) Vitamin b) Enzyme
double bonds occupy the position at c) Hormone d) Carbohydrate
a) C–9, C–15 b) C–12, C–15 44. Receptors of hormones are generally
c) C–9, C–12, C–15 d) C–9 only a) Carbohydrates b) Vitamins
32. Lanoline wool is c) Lipids d) Proteins
a) Palmitic ester of cholesterol only 45. Steroid hormones are produced by the
b) Stearic ester of cholesterol only a) Adrenal cortex b) Pancreas
c) Oleic ester of cholesterol only c) Thyroid d) Testis e) Pitutiary
d) Palmitic or steric or oleic ester of cholesterol a) a and d b) a, b and c c) c, d d) d, e
33. Glycolipids are 46. Substances produced by endocrine glands are
a) Hetero lipids b) Neutral fats a) Vitamines b) Harmones
c) Derived lipids d) Waxes c) Herb d) Drug

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Daily Practice Paper 143 BIOMOLECULE
47. Which of the following is a derivative of amino acid? The correct match is
a) Thyroxin b) Estradiol a) 1–b; 2–b; 3–c; 4–d b) 1–b; 2–a; 3–d; 4–c
c) Estrogene d) Progesterone c) 1–b; 2–a; 3–c; 4–d d) 1–c; 2–a; 3–d; 4–b
48. Total number of carbon atoms present in steroid 59. For artificial ripening of fruit which of the following is
nucleus. used?
a) 24 b) 17 c) 10 d) 20 a) Testosterone b) Insulin
49. Which of following hormone is produced by testis? c) Ethylene d) Estrogen
a) Progesterone b) Estradiol 60. Which of the following hormones contains iodine?
c) Testosterone d) Estrone a) Insulin b) Thyroxine
50. Harmone containing only ketonic functional group is c) Adrenaline d) Testosterone
a) Estradiol b) Progresterone 61. Which of the following is a male sex hormone?
c) Testosterone d) Insulin a) Progesterone b) Estrone
51. Synthetic testosterone promotes c) Epinephrine d) Testosterone
a) Menstrual cycle b) Muscle growth 62. The hormone which helps the uterine cycle in women
c) respiration d) Birth control agents is
52. Phosphorylation of glucose is increased by a) Estrone b) Androsterone
a) Auxins b) Insulin c) Progesterone d) Testosterone
c) Ethylene d) Trausmatic acid 63. The sex hormone which controls the development and
53. In insulin molecule S–S linkage is in between maintenance of pregnancy is
a) Cysteine–Glycine b) Cystein–Cystein a) Cortisone b) Thyroxine
c) Cysteine–Valanine d) Proline–Cystein c) Progesterone d) estrone
54. Which of the following is not an example of phyto- 64. The hormones used by athletes to increase the mass
hormones? and strength of muscles is/are
a) Cytokinins b) Ethylene a) Estrogens b) Gestogens
c) Auxins d) Insulin c) Androgens d) Both estrogens and androgens
55. Estradiol is responsible for the development of 65. Number of six membered rings present in a steroid
a) Primary male characters nucleus is
b) Secondary female characters a) 1 b) 2 c) 3 d) 4
c) Primary female characters 66. The organic compound that transfer biological infor-
d) Secondary male characters mation from one group of cells to distant tissues or
56. Which of the following maintains constant sugar level organs are called as
in blood? a) Vitamins b) Proteins
a) Gibberlins b) Insulin c) Hormones d) Carbohydrates
c) Glucogen d) Estrone 67. Insulin is a
57. Set A Set B a) Non steroidal, peptide hormone
Name of hormone Functional group b) Steroidal, peptide hormone
in hormons c) Non steroidal, amino acid hormone
1) Testosterone a)Double bond d) Steroidal, amino acid derivative hormone
2) Estradiol b)Ketone 68. An example for amino acid hormone is?
3) Progesterone c)Alcohols a) Insulin b) Testosterone
4) Ethylene d) Alcohol and ketone c) Thyroxine d) Progesterone
The correct match is 69. In insulin molecule there are two chains ‘A” and ‘B’,
a) 1–c; 2–b; 3–d; 4–a b) 1–d; 2–c; 3–b; 4–a ‘A’ contain ‘X’-amino acids and ‘B’ contain ‘Y’
c) 1–d; 2–c; 3–a; 4–b d) 1–a; 2–b; 3–c; 4–d amino acids. The value of X and Y are
58. Set A Set B a) 21, 31 b) 21, 30 c) 28, 36 d) 32, 34
1) Steroid hormone a) Cytokinins 70. Terpenes are the polymers of
2) Non steroid hormone b) Estrogens a) Pentanoic acid b) 1, 3–Pentadiene
3) Plant hormone c) Auxins c) Isoprene d) Pentanal
4) Peptide hormone d) Insulin

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Daily Practice Paper 144 BIOMOLECULE
71. Combustion of proteins with nucleic acids gives c) alcohol, phosphoric acid and fatty acid
a) enzymes b) polypeptides d) alcohol, amino acid, carbohydrate
c) nucleo proteins d) dipeptides 82. The following is one of the important biological roles
72. A triglyceride can have how many different acyl of lipids
groups? A) enzyme activators B) energy source
a) 3 b) 2 c) 1 d) 4 C) emulsifiers D) vitamin carriers
73. Tristearin and Triolein are ---- lipids a) A and D b) B and C
a) saturated, unsaturated c) A, C and D d) A, B, C and D
b) unsaturated, unsaturated 83. Which of the following hormones is produced under
c) saturated, saturated the conditions of stress which stimulate glycogenoly-
d) unsaturated, saturated sis in the liver of human beings?
74. Glycerides are also called neutral lipids because they a) Adrenaline b) Estradiol
a) dissolve in water to give neutral solutions c) Thyroxine d) Insulin
b) do not undergo hydrogenation 84. The incorrect statement regarding enzymes is:
c) do not carry any charge a) Like chemical catalysts enzymes reduce the acti-
d) exist as zwitter ions in aqueous solutions vation energy of bio processes.
75. Which of the following cannot be further hydroge- b) Enzymes are polysaccharides.
nated? c) Enzymes are very specific for a particular reac-
a) Tripalmitin and Triolein tion and substrate.
b) Triolein and Tristearin d) Enzymes are biocatalysts.
c) Tristearin and Trilinolein 85. Which one of the following statements is not true
d) Tristearin and Tripalmitin about enzymes? (JEE Main 2021)
76. Spermaceti and Bee’s wax belong to esters of a) Enzymes are non-specific for a reaction and sub-
a) same alcohol but different fatty acids strate
b) same fatty acid but different alcohols b) Almost all enzymes are proteins
c) different alcohols and fatty acids c) Enzymes work as catalysts by lowering the acti-
d) same alcohol and same fatty acid vation energy of a biochemical reaction
77. In glycerol, if one of the H-atoms of –OH groups is d) The action of enzymes is temperature and pH spe-
replaced with phosphoric acid, then it is called cific.
a) a simple lipid b) a compound lipid 86. Match List-I with List-II (JEE Main 2022)
c) a glycolipid d) a hormone List-I List-II
78. One mole “trilinolein” (X) on hydrogenation gave Y Enzyne Conversion of
where 9 moles of hydrogen are found to be consumed. A. Invertase I. Starch into maltose
Now, number of “pi” bonds in X are B. Zymase II. Maltose into glucose
a) 3/ molecule b) 3/each chain of fatty acid C. Diastase III. Glucose into ethanol
c) 6/molecule d) 9/each chain of fatty acid D. Maltase IV. Cane sugar into glucose
79. A diglyceride on hydrolysis gave glycerol and a fatty Choose the most appropriate answer from the op-
acid. If the formula of fatty acid is C15H31COOH, tions given below:
the diglyceride is a) A-III, B-IV, C-II, D-I
A) simple lipid B) 1, 2–stearin b) A-III, B-II, C-I, D-IV
C) 1, 2–palmitin D) 1, 3–palmitin c) A-IV, B-III, C-I, D-II
a) A, B and D b) B, C and D d) A-IV, B-II, C-III, D-I
c) A, B and C d) A, C and D 87. Given below are two statements: (JEE Main 2023)
80. Which of the following does not belong to “phospho- Statement I: Noradrenaline is a neurotransmitter.
lipids” Statement II: Low level of noradrenaline is not the
a) glycerophosphotides b) phosphoinositides cause of depression in human.
c) Phosphosphingosides d) Glycolipids In the light of the above statements, choose the cor-
81. Glycolipid contains the following parts rect answer from the options given below
a) amino alcohol, fatty acid and carbohydrate a) Statement I is correct but Statement II is incorrect
b) alcohol, phosphoric acid and carbohydrate b) Both Statement I and Statement II are correct.

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Daily Practice Paper 145 BIOMOLECULE
c) Both Statement I and Statement II are incorrect a) Adenine b) Uracil
d) Statement I is incorrect but Statement II is correct c) Thymine d) Cytosine
9. Which of the following bases is not present in DNA?
KEY a) Adenine b) Thymine
EXERCISE-2 c) Cytosine d) Uracil
1)a 2)c 3)b 4)c 5)d 6)b 7)b 10. Which of the following are purine bases?
8)d 9)d 10)a 11)d 12)d 13)c 14)b a) Guanine b) Adenine
15)b 16)d 17)a 18)d 19)b 20)a 21)a c) Thymine d) Uracil
22)a 23)d 24)b 25)c 26)a 27)b 28)d Assertion and Reason
29)c 30)b 31)c 32)d 33)a 34)c 35)b a) If both assertion and reason are true and reason is
36)c 37)a 38)d 39)c 40)a 41)d 42)a the correct explanation of assertion.
43)c 44)d 45)a 46)b 47)a 48)b 49)c b) If both assertion and reason are true but reason is
50)b 51)b 52)b 53)b 54)d 55)b 56)b not the correct explanation of assertion.
57)b 58)c 59)c 60)b 61)d 62)c 63)c c) If assertion is true but reason is false.
64)c 65)c 66)c 67)a 68)c 69)b 70)c d) If both assertion and reason are false.
71)c 72)a 73)a 74)a 75)d 76)b 77)b 11. Assertion: Purine bases present in DNA are adenine
78)b 79)d 80)d 81)a 82)d 83)a 84)b and guanine.
85)a 86)c 87)a Reason: The base thymine is present in RNA while
base uracil is present in DNA.
12. Assertion: The two strands of DNA are complemen-
D.P.P.-40 tary to each other.
Reason: Adenine specifically forms hydrogen bonds
NUCLEIC ACIDS with guanine whereas cytosine forms hydrogen bonds
with thymine.

KEY
1. What are nucleic acids? Mention their two important
functions. 6)a 7)b 8)c 9)d 10)a,b 11)c 12)c
2. What is the difference between a nucleoside and a
nucleotide?
3. The two strands in DNA are not identical but are
complementary. Explain.
4. Write the important structural and functional differ- 1. Which of the following constitutes the genetic mate-
ences between DNA and RNA. rial of the cell?
5. What are the different types of RNA found in the a) Nucleic acids b) Proteins
cell? c) Lipids d) Carbohydrates
NCERT EXAMPLER QUESTIONS: 2. Nuclic acids are called acids mainly because of the
6. Dinucleotide is obtained by joining two nucleotides presence of
together by phosphodiester linkage. Between which a) –COOH group
carbon atoms of pentose sugars of nucleotides are b) –OH group of sugar unit
these linkages present? c) –OH group of the heterocyclic base
a) 5 and 3 b) 1 and 5 d) –OH group of phosphate unit
3. Which of the following is not a pyrimidine base
c) 5 and 5 d) 3 and 3
a) Uracil b) Thymine c) Cytosine d) Guanine
7. Nucleic acids are the polymers of ....... . 4. The following does not belong to either purines or
a) Nucleosides b) Nucleotides pyrimidines
c) Bases d) Sugars a) Tryptophan b) Cytosine
8. DNA and RNA contain four bases each. Which of c) Uracil d) Adenine
the following bases is not present in RNA?

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Daily Practice Paper 146 BIOMOLECULE
5. Purine without ketonic group is a) Hydrogen bond b) Peptide bond
a) adenine b) adenosine c) Glycosidic linkage d) Phosphate groups
c) cytidine d) thymidine 19. In a nucleotide the phosphate linkage is generally at-
6. The purine base present in RNA is tached to
a) Guanine b) Thymine a) C – 1 of sugar b) C – 2 of sugar
c) Cytosine d) Uracil c) C – 5 of sugar d) N – of base
7. 6–amino purine is 20. In both DNA and RNA, heterocyclic base and phos-
a) Adenosine b) Adenine phate ester linkages are at
c) Cytosine d) Thymine a) C’5 and C’2 respectively of the sugar molecule
8. The bases that are common in both RNA and DNA b) C’2 and C’5 respectively of the sugar molecule
are c) C’1 and C’5 respectively of the sugar molecule
a) adenine, guanine, cytosine d) C’5 and C’1 respectively of the sugar molecule
b) adenine, guanine, thymine 21. Adenine pairs with thymine through
c) adenine, uracil, cytosine a) two hydrogen bonds b) one hydrogen bond
d) guanine, uracil, thymine c) three hydrogen bonds d) four hydrogen bonds
9. The pyrimidine bases present in RNA are 22. How many base pairs are present in each full turn of
a) Cytosine and Thymine b) Thymine and Uracil the DNA double helix?
c) Cytosine and Uracil d) Uracil and Guanine a) 4 b) 6 c) 8 d) 10
10. Adenosine monophosphae (AMP) is a 23. The base present in Cytidine:
a) nucleotide b) nucleoside
c) insecticide d) antibacterial
11. An example for N-glycoside is
a) Adenine b) Guanine
c) Cytosine d) Cytidine
12. Which one of the following is not present in DNA?
a) adenine b) ribose
c) cytosine d) guanine
13. A nitrogeneous base which is present in the structure
of RNA but not in DNA is 24. Hydrolysis of adenosine triphosphate involves rupture
a) Uracil b) Thymine c) Cytosine d) Guanine of
14. The pentose sugar in DNA and RNA has a) Base-sugar bond b) Sugar-phosphate bond
a) Open chain structure b) Pyranose structure c) P–O–P bond d) P–N–P bond
c) Furanose structure d) None of the above 25. The backbone of a nucleotide strand contains the fol-
15. Adenosine is an example of a lowing sequence of arrangement
a) Nucleotide b) Nucleoside a) Base –Sugar b) Sugar–Phosphate
c) Purine base d) Pyridine base c) Base–Phosphate d) Base1–Base2
16. Nucleoside on hydrolysis gives 26. Number of base pairs present in total DNA of human
a) Pentose sugar and purine base cell (human genome) is around
b) Pentose sugar, phosphoric acid, purine or a) 2.9 × 105 b) 2.9 × 108
pyrimidine base c) 2.9 × 10 7
d) 2.9 × 109
c) Pentose sugar and a heterocyclic base 27. AT/GC value for human beings is
d) Heterocyclic base and phosphoric acid a) 1.52 b) 1.25 c) 0.93 d) 1
17. In nucleic acids, the sequence is represented as 28. The ratio of number of A+G to the number of C + T
a) Phosphate – base – sugar in DNA of E. Coli species is
b) Sugar – base – phosphate a) 1 : 1 b) 0.93 c) 1.52 d) 1.8
c) Base – sugar – phosphate 29. The couplings between base units of DNA is through:
d) Base – phosphate – sugar a) Hydrogen bonding b) Electrostatic bonding
18. In nucleic acids, the nucleotides are linked to one an- c) Covalent bonding d) Vander Waals forces
other through 30. The main role of DNA in a living system is
a) It is the structural material of cell walls

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Daily Practice Paper 147 BIOMOLECULE
b) It is an enzyme c) protein is synthesised at the ribosomes
c) It carries the hereditary characteristics of the d) none of the above
organism 42. The chemical change in DNA molecule that could
d) It participates in cellular respiration lead to synthesis of protein with an altered amino acid
31. Synthesis of identical copies of DNA is called sequence is called
a) transcription b) replication c) translation a) Replication b) Lipid formation
d) reverse transcription c) Cellular membrane d) Mutation
32. Which of the following statements about RNA is in- 43. The relationship between the nucleotide triplets and
correct? the amino acids is called
a) It has a single strand a) Translation b) Transcription
b) It does not undergo relication c) Replication d) A gentic code
c) It contain any pyridimine base 44. Cytosine, Thymine and Uracil are similar with respect
d) It controls the synthesis of proteins to
33. If the sequence of bases in DNA is TGAACCCTT, a) C = O at 2nd position in pyrimidine ring
the sequence of bases in m-RNA is b) NH2 group at 4th carbon in pyrimidine ring
a) ACUUGGGAA b) TCUUGGGTT c) C = O at 4th position in pyrimidine ring
c) ACUUCCCAA d) TUCUGTUTU d) absence of C = O group at 2nd position in
34. The synthesis of m RNA will be in the direction of pyrimidine ring
a) 31  51 b) 51  31 45. Number of C = O groups in thymine and in X are
equal. Now, X is
c) by both d) none
a) cytosine b) uracil
35. The genetic information of a human cell contained in
c) adenine d) guanine
_____ of chromosomes
46. The following group/linkage is absent in Adenine but
a) 46 pairs b) 23 pairs c) 46 d) 23
present in Guanine
36. Which of the following processess in “semi conser-
a) –C  N b) –NH2
vative”?
c) > C = O d) –CONH2
a) tranlation b) transcription
47. The sugar unit present in the nucleotides of RNA is
c) replication d) reverse transcription
37. During the replication of DNA, one of the two strands a) D –  – ribose b) L –  – ribose
is synthesized in pieces and are joined latter in the c) D –  – ribose d) L –  – ribose
presence of enzyme called 48. Phosphate ester of X is called a nucleotide. X is
a) RNA ligase b) DNA ligase a) adenine b) guanine
c) r-RNA d) m-RNA c) nucleoside d) thymine
38. Which of the following statements about DNA is not 49. In nucleosides, mth N-atom of pyrimidine base is joined
correct? to nth C-atom of ribose sugar
a) It has a double helix structure moiety. Here m and n are
b) It undergoes replication a) 1, 1 b) 1, 4 c) 1, 2 d) 1, 5
c) The two stands in a DNA molecule are 50. In the nucleotide namely adenosine–5’–tri phosphate,
exactly similar the sequence of linkages among N(base), C(sugar)
d) It contains the pentose sugar, 2–deoxyribose and P(phosphate) is
39. The RNAs which take part in the synthesis of pro- a) C – P – N – P – P b) N – C – P – P – P
teins is/are c) P – C– N – P – P d) P – P – P – C– N
a) m-RNA b) r-RNA 51. Two or more nucleotides of RNA or DNA are joined
c) t-RNA d) All the three above as
40. Each codon consists of _____ nitrogen bases a) 3’ – 5’ b) 5’ – 5’ c) 3’ – 3’ d) 5’ – 3’
a) four b) twenty 52. Incorrect relationship regarding all types of living spe-
c) three d) sixty four cies is
41. Transcription is a process when a) A + G = C + T b) A + G = C + U
a) messenger RNA is formed from DNA c) (A + T) / (C + G) = 1 d) (A + T) / (C + G)  0
b) ribosome RNA is formed from DNA

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Daily Practice Paper 148 BIOMOLECULE
53. A: Guanine unites with Cytosine but not with Thym- 59. 64 codons code for
ine a) 100 amino acids b) 20 amino acids
R: Guanine and Cytosine are purine bases while c) 10 amino acids d) 700 amino acids
Thymine is a pyrimidine base 60. Combination of proteins with nucleic acids give
a) A and R are true and R explains A a) enzymes b) polypeptides
b) A and R are true but R does not explain A c) nucleo proteins d) dipeptides
c) A is true and R is false 61. The correct statement regarding RNA and DNA
d) A is false and R is true respectivly is [2016]
54. The reason for double helical structure of DNA is a) The sugar component in RNA is ribose and the
operation of sugar component in DNA is 2’-deoxyribose
a) Vander Waal’s forces b) The sugar component in RNA is arabinose and
b) dipole-dipole interaction the sugar component in DNA is ribose
c) hydrogen bonding c) The sugar component in RNA is arabinose and
d) electrostatic attractions the sugar component in DNA is 2’-deoxyribose
55. RNA differs from DNA with respect to the following d) The sugar component in RNA is 2’-deoxyribose
a) type of base unit b) type of sugar unit and the sugar component in DNA is arabinose
c) type of H-bond d) 1 and 2 62. Which one of the following is correct structure for
56. Observe the following statements cytosine? 2021
A) for DNA, the form having right handed helices
with  -conformation is less stable
B) on heating, DNA melts so that the two strands
separate and on cooling, they unite
a) b)
C) RNA is single stranded while DNA is double
stranded
Correct statements are
a) A and B b) B and C
c) A and C d) A, B and C
57. In the double helix structure of DNA the base pairs
are
a) Part of the back bone structure c) d)
b) Inside the helix
c) Outide the helix d) None of these
58. Match the following
Set A Set B 63. Out of following isomeric forms of uracil, which one
A) Replication 1) formation of RNA is present in RNA? 2021
from DNA
B) Transcription 2) synthesis of copy of
DNA
C) Translation 3) single strand of DNA a) b)
D) Template 4) synthesis of proteins
by RNA
Now, correct match is
A B C D
a) 4 3 2 1
b) 1 2 4 3
c) 2 1 4 3 c) d)
d) 2 1 3 4

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Daily Practice Paper 149 BIOMOLECULE
64. The number of oxygens present in a nucleotide formed
from a base, that is present only in RNA is ____.
65. Uracil is a base present in RNA with the following
structure. % of N in uracil is 2023

66. If one strand of a DNA has the sequence

ATGCTTCA, sequence of the bases in complemen-
tary strand is: (JEE Main 2024)
a) CATTAGCT b) TACGAAGT
c) GTACTTAC d) ATGCGACT
67. The total number of correct statements, regarding the
nucleic acids is ______. (JEE Main 2024)
A. RNA is regarded as the reserve of genetic infor-
mation.
B. DNA molecule self-dupllicates during cell division
C. DNA synthesizes proteins in the cell.
D. The nessage for the synthesis of particular pro-
teins is present in DNA
E. Identical DNA strands are transferred to daughter
cells.

KEY
EXERCISE-2
1)a 2)d 3)d 4)a 5)a 6)a 7)b
8)a 9)c 10)a 11)d 12)b 13)a 14)c
15)b 16)c 17)c 18)d 19)c 20)c 21)a
22)d 23)d 24)c 25)b 26)c 27)c 28)a
29)a 30)c 31)b 32)c 33)a 34)b 35)b
36)c 37)b 38)c 39)d 40)c 41)a 42)d
43)d 44)a 45)b 46)c 47)a 48)c 49)a
50)b 51)d 52)c 53)c 54)c 55)d 56)b
57)b 58)c 59)b 60)c 61)a 62)c 63)d
64)9 65)25 66)b 67)3

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